Pilot-light-burner control



E. HECTOR.

PILOT LIGHT BURNER CONTROL.

APPLICATION FILED FEB. I3, 1919. RENEWED APR. 30, 1921.

Patented Dec. 6, 1921..

2 SHEETS,SHET I.

ATTORNEY E. HECTOR.

PILOT LIGHT BURNER CONTROL. APPLICATION FILED FEB. 18, 1919. RENEWED APR. 30, 1921.

1,399,656, Patented Dec. 6, 1921,

2 SHEETS-SHEET 2- Wag/aw ATTORN Y UNITED STATES,

ENOCH HECTOR, OF NEW YORK, N. Y., ASSIGNOR, IBY MESNE AEiSIG- PTENT we, are "run YALE &: TOWNE MANUFACTURING. COMPANY, OF STAMFORD, CONNECTICUT, A

CORPORATION OF CONNECTICUT.

rInor-men'r-normnn comet.

Specification of Letters Patent.

Original application filed October 16, 1913, Serial No. 125,795. Divided and this application filed February 18, 1919, Serial No. 277,868. Renewed April 3t), 1921. Serial No. 4659M.

To all whom. it may concern:

Be it known that zen of the United tates, residing in the city, county, and State of New York, have invented certain new and useful Implovements in Pilot-Light-Burner Controls, of which the following is a specification.

My invention relates to a carbureter or similar fuel charge forming dci'rice designed for use where hydrocarbon fuel is fed to a vaporizer and its burner and specifically relates to the organization of piping which supplies the burner and vaporizer "and the invention herein claimed constitutes a division of my copending application on carbureters, Serial No. 125,795, filed Oct. 16, 1916. The parent application features a construction in. which liquid fuel i's'forced to a vaporizer and its burner in proportioned,

is further contemplated to provide a device of the class described which will be promptly responsive to the variable demands from the engine; which can be readily assembled and demounted and which can be controlled manually or automatically.

Various other objects and advantages of the invention will be in part obvious from an inspection of the accompanying drawings and in part will be more fully set forth in the following particular description of one form of mechanism embodying my invention, and the invention also consists in certain new and novel features of construction and combination of parts hereinafter set forth and claimed.

Referring to the accompanying draw;-

%igure 1 is a side view partly in vertical I ENOCH Rno'ron, a citisection of a preferred embodiment of my invention shown in position connected to an en no; and

ig. 2 is a horizontal sectional view talren on the line 2-2 of Fig. l.

In the following description and in the claims, parts will be identified by specific names for convenience of expression but they are'intended to be as generic in their application to similar parts as the art will permit.

In the drawings there is shown a power member such as a shaft 7 having a speed of rotation dependent upon the speed of an elm-- gine driving the same and which in one form of the invention may be the engine indicated symbolically by the intake manifold 6 supplied by the fuel generated by the device illustrated. The shaft is pro-' vidcd with a ar 8 actuating a pump 9. This pump is esigned to force fuel from a source of supply, indicated diagrammatically by the gravity flow pipe 10, to the cal.-

bureter at a rate responsive to any variation in speed of the engine, so'that when the engine is running fast proportionately more fuel is passed by the pump er unit of time than vthen running relative y slow.

The carburetor includes an organization of a vaporizing device including a burner for heating the same, and a system of valved plping, including the pump 9, for supply-- fingfuel to both the burner and vaporizing evlcc.

The vaporizerincludes a shell 12 provided with a chimney 15 for the products of combustion from a burner 14 inclosed within the lower portion of the shell. For convenience of expression this burner in its collective capaclties will be referred to in some of the claims as a heating device formed of a main burner" when burning under high pressure and a pilot or reheating burner when burning under relatively low pressure.

A four arm spider 18 (see Fig, 2) 'is demountably ositioned at the bottom of the shell and astened thereto by screws 19. The central portion of the spider-is in the form of an open top flat cylindrical cup 20, arranged to receive any fuel s illed from the burner and arranged to constitute a well for receiving a charge of fuel when it is desired to quickly heat the burner. The burner it Mid heating condition when the engine is running at its most efficient speed.

Thepiping system for supplying fuel to the coil and burner includes a rotary type of pump 9 driven from the engine shaft 7 through multiplying gearing formed of the gear wheels 8 and 42, the latter fixed to the pump shaft 43. The intakeend of'the pump is supplied with fuel from the discharge end 44 of the pump is connected to a main pipe line 45. This pipe line includes two branches, one branch 46 leading to the burner 14 and the other branch 47 leading tothe lower'end of the heating coil 40.

The branches are so proportioned that when the engine is running at 'the speed Which gives its maximum efficiency, the vaporizing device is supplied with an amount of fuel per unit of time requisite to effect this maximum efiieiency and the burner is supplied with an amount of fuel just sufficient to properly vaporize this theoretically perfect amount of fuel passing through the vaporizing device.

A single control valve 48 is positioned in the main line to control the flow through both of the branches. A lever 51 is attached to the stem'49 and is arranged so that it may be actuated manually when such a control is desired or it may be connected to the engine governor when it is desired to control the fuel supply by the speed of the engine or, in fact,.the lever may be connected with any known form of automatic control The device illustrated includes means for feeding a relatively small amount of fuel to the burner for the purpose of maintaining a pilot light when the burner is not otherwlse in active operation. These-means include a by-pass pipe 52 of small bore leading from the pipe 10 to the branch 46 adjacent its connection with the burner. The by-pass includes a check valve 53. normally closed and opening in the direction of flow through the by-pass. A main 'fuel control valve 54 is positioned in the pipe 10 for the purpose of regulating the supp y from the reservoir (not shown) to the device illustrated.

The branch 46 is provided with a check valve 55 normally closing off the main fuel supply to the burner and opened by a rise in pressure in the piping system through the actuation of the 'pump or other pressure creating means." I

In operation and assuming that there is a pressure of fuel; in the reservoir or where the pipe 10 and the gravity feed system is used that the elevation of the tank is sufiicient to maintain a pilot light, the valve 54 is opened and the pilot light at the burner lit through the space between the arms of the spider 18 at the bottom of the vaporizing device. The pressure in the pipe 10 is sufiicient to open the relatively light check valve 53 and thus permit the fuel to flow through the by-pass pipe to supply a pilot light in the burner. "he pilot light not only forms an igniter for the burner but serves to maintain the vaporizing device hot and thus insures a prompt vaporizing of the engine fuel when the engine is started. 80

he engine is started, the lever 51 set to open the valve 48 as is usual in starting engines of the type disclosed and the pump begins to force the fuel from the pipe 10 through the main pipe line, as shown by the arrows in Fig. 1. The pressure created by the pump acts on the check valve 55 to open the same and as long as the pressure is maintained fuel will flow past this check valve to the burner. The pilot light will ignite the fuel thus forced to the burner.

The high pressure created by the pump on the fuel in the branch 46 reacts through the by-pass pipe to overbalance the normal pressure acting to open the check-valve 53 and permits or forces the check valve closed thus intercepting any flow from the pump back into the supply pipe 10.

Should the speed of the engine increase or decrease from its normal working speed, the pump will respond accordingly and force a proportionately greater or less amount of fuel to the vaporizing device and burner thus affecting not only an automatic regulation of the fuel supply passed to the engine but also an automatic regulation of the amount of fuel fed to the burner.

By adjusting the position of the lever 51 the amount of fuel permitted to pass into the engine is regulated as is usual with devices of this character but in addition to this function the lever 51 also controls the burner. When the lever is moved into position to intercept the flow through the main pipe line, the pressure therein is reduced, the valve 55 closes automatically and the normal gravity )ressure in the pipe 10 opens the valve 53 and restablishes the pilot light in active operation. By using a rotary type of pump the same can run idly under its own momentum after the control valves are shut off without doing any particular harm.

Having thus described my invention, I claim:

1. In a device of the class described, the combination with a source ofliquid fuel, a rotary pump constantly open to and supplied from said source and having a dis charge port, a burner, a main conduit of relatively large conducting capacity between 180 reeente the discharge port oil the pump and said burner, a valve normally closing" said conduit, a hy-pass conduit of relatively small conducting capacity, carried by the pump, supplied from said source and leading to the burner, a gravity controlled valve insaid hy-pass conduit closed by the pressure from the pump in the main conduit acting on the top thereof and opened by the pressure from said source acting on the underside thereof When free of the pump pressure.

2. ln a device of the class described, the combination with a source oi fuel, free from pressure thereon except the pressure incidental to a gravity flow, a burner, a rotary pump constantly open to said source so as to he primed thereby at all times, means for connecting the discharge port of the pump with the burner to supply the same With fuel under relatively high pressure and for insuring a fluid connection between the source and the burner to provide a pilot light at the burner when said pump is inactive Signed at New York city, in the county of New York and State of New York, this 31 day of January, it. D. 1919.

ENUCH REGTQR. 

